View report page

98
some Streptococci at all events, multiply rapidly in milk
at summer temperature; the other is that the ' fore
milk' of apparently healthy cows way sometimes contain
numerous streptococci. Moreover, it is a matter of
great difficulty to sift the harmful streptococci from
those of the innocuous sort.
The first difficulty may he surmounted of the
imposition of a standard temperature for. milk (below
10deg. centigrade) be considered practicable; the second
difficulty may perhaps eventually be solved by the
discovery of new media and improved methods of
isolating and differentiating streptococci."
(4) "Total Number of Bacteria.— Bacteria
multiply so rapidly in milk, that to judge the purity of
a milk by the total number of microbes present in it, is
open to many objections. Not least among these is the
fact that the majority of bacteria in milk are innocuous.
Yet even this test, although of subordinate importance
to tests 1, 2, and 3, may be of some value if a standard
temperature below lOdeg. centigrade be adopted."